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Mother and Child Health: Research Methods. G.J.Ebrahim Editor Journal of Tropical Pediatrics, Oxford University Press . Random Sampling. Simple Random sampling Stratified random sampling Quota sampling Area sampling Systematic sampling Cluster sampling 30 clusters each of 7 individuals.

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Mother and Child Health: Research Methods

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Mother and Child Health: Research Methods

G.J.Ebrahim

Editor

Journal of Tropical Pediatrics, Oxford University Press.


Random Sampling

  • Simple Random sampling

    • Stratified random sampling

    • Quota sampling

    • Area sampling

    • Systematic sampling

  • Cluster sampling

    • 30 clusters each of 7 individuals


Validity and sample Size

External Population

Target Population

Sample

Validity


Sources of Distortion

Target Population Subjects in catchment area

IdentificationSubjects referred

Contact ParticipationFollow-up

Final Study Sample


Calculating Sample Size

Factors to consider are:

  • Effect Size

  • Acceptable Risk of False Positive (p < 0.05)

  • Power of the Study (cut-off is 80%)


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